发明授权
- 专利标题: Bi-directional video compression for real-time video streams during transport in a packet switched network
- 专利标题(中): 在分组交换网络传输期间实时视频流的双向视频压缩
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申请号: US14334459申请日: 2014-07-17
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公开(公告)号: US09253063B2公开(公告)日: 2016-02-02
- 发明人: Harsha Hegde , Tarun Agarwal
- 申请人: Google Technology Holdings LLC
- 申请人地址: US CA Mountain View
- 专利权人: Google Technology Holdings LLC
- 当前专利权人: Google Technology Holdings LLC
- 当前专利权人地址: US CA Mountain View
- 代理机构: Fenwick & West LLP
- 主分类号: H04N19/48
- IPC分类号: H04N19/48 ; H04N19/164 ; H04N19/172 ; H04N19/107 ; H04L12/26 ; H04N21/6437 ; H04N21/647 ; H04L29/06 ; H04N19/00 ; H04N19/156
摘要:
A method, a system and a computer device for initiating bi-directional compression of a video stream in a packet switched network, based on delay tolerance of a service or application. A video frame recompression (VFR) utility determines an end-to-end (E2E) delay tolerance retrieved from a Real-time Transport Control Protocol (RTCP) report. The VFR utility then determines the actual expected delay based on a deep inspection of packet headers. The VFR utility utilizes a processing opportunity delay (which determines whether the E2E delay tolerance is greater than the actual expected delay) to reprocess video content comprising Intra-coded (I) pictures/frames and Predicted (P) frames to improve compression efficiency. The VFR utility may also utilize a complexity ratio which is a ratio of the I-Frame rate and the P-Frame rate to select frames for compression. The VFR utility recompresses video content by replacing P-Frames with B-Frames.
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